Former Wales and Lions centre Allan Bateman scored a brace of tries in his final game for Hoel y Cyw before he hangs up his boots for good. The 45-year-old, who also played rugby league for Great Britain, helped his side demolish Treherbert 74-0 and consolidate their fifth place in Division Three South East.
Tylorstown sneaked ahead in the race for the title, taking advantage of Penarth's 18-18 draw with Aberdare by hammering Llandaff North 52-12.
St Peters also capitalised, beating Brecon 31-6 to jump up to second, while at the other end Fairwater earned what could turn out to be a vital bonus point as they lost 18-14 at Llanishen.
Ian Davies was in sparkling form again for Division Two East leaders Gilfach Goch. The full-back landed a perfect seven-out-of-seven kicks as the Goch won 33-15 at Llantrisant.
But they may rue the missed bonus point as Mountain Ash closed the gap to nine points with a 35-7 victory over Ynysybwl, thanks in large part to two tries apiece by Gavin Roberts and Thomas Pascoe.
There was also double-delight for Treorchy wing Peter Hutchings, who bagged a brace as the promotion-chasers beat Llantwit Fardre 39-25.
Newport Saracens might yet escape the drop after a nervy 20-19 win at Rhydyfelin, while fellow strugglers Penallta beat Garndiffaith 31-18.
Abergavenny may lead Division Three East by 11 points but they were made to earn victory by Newport HSOB.Tries by wing Will Williams, number 8 James Williams, and centres Stuart and Ian Davies scraped them home, 24-14.
The ever-brilliant Paul Emanuelli was again the hero for second-placed Fleur de Llys, kicking 19 points as they beat Croesyceiliog. Wing Jamie Henthorn crossed twice to seal the 29-24 win for Fleur, who have four games in hand on the leaders.
Dowlais are champions-elect of Division Four South East after they beat Dowlais 28-10 and rivals Cardiff HSOB went down 30-25 to Taff's Well.
The last five years have been an emotional rollercoaster on and off the pitch for RGC1404. Promotion to the Principality Premiership was the culmination of five years of hard work and investment in North Wales. WRU TV caught up with prop Joe Simpson, who was one of the first intake of WRU North Wales Academy players in 2010.
Ebbw Vale captain Damien Hudd picked up the biggest accolade of the night at the 11th Principality Premiership Awards Evening held at Principality Stadium, after leading his side to the title for the first time.
Wales assistant coach Robin McBryde is predicting a tough battle against England on Sunday despite the fact they may not be considered to be at full strength. Players will be out to impress Eddie Jones which makes England a dangerous proposition, he says.
Wales U20 captain Tom Phillips and performance psychologist Dr Rich Neil explain why spending three days at Monmouth RFC has further strengthened the togetherness of the squad ahead of the #WorldRugbyU20s